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A Study on the heat transfer characteristics of a normal axisymmetric under-expanded impinging jet on a surface

수직 축대칭 과소팽창 충돌 제트의 표면 열전달 특성 연구

  • Published : 2005.08.01

Abstract

An experimental investigation has been carried out to examine heat-transfer characteristics of an axisymmetric, under-expanded, sonic jet impinging on a flat plate and the local measurement of surface pressures and heat transfer coefficients on a plate have been achieved together with a visualization test of shock structure in a jet. Heat transfer coefficients on a plate have been found to be changed significantly depending on the under-expansion ratio as much as the nozzle-to-plate distance. These phenomena could be explained by the wall pressure measurement and the shock visualization.

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